WFA performs outstanding refractoriness & high erosion resistance and is the key aggregate for refractory bricks and castable.
Union WFA is used as aggregates in refractory bricks and castables on the characteristics of high thermal shock resistance and great corrosion resistance. High purity alumina is fused at 2,300℃ and re-crystallized into white artificial corundum, which is highly preferred in the refractory industry.
White fused alumina is used for refractory aggregates in bricks and castables. It shows high performance over strength and wear resistance. The products are diversified into various grains and also can be customized by user’s demand.
Item | Coarse Size | Fine Size | |||||
---|---|---|---|---|---|---|---|
Specification | Typical data | Specification | Typical data | Specification | Typical data | ||
Chemical composition |
Al2O3 | 99.0 Min. | 99.20~99.60 | 99.0 Min. | 99.15~99.50 | 99.0 Min. | 99.15~99.50 |
Fe2O3 | 0.08 Max. | 0.02~0.04 | 0.08 Max. | 0.03~0.06 | 0.08 Max. | 0.03~0.06 | |
Na2O | 0.35 Max. | 0.27~0.33 | 0.40 Max. | 0.30~0.38 | 0.45 Max. | 0.35~0.43 | |
SiO2 | 0.05 Max. | 0.02~0.04 | 0.05 Max. | 0.03~0.05 | 0.05 Max. | 0.03~0.05 | |
True Specific Gravity | 3.90 Min. | 3.94~3.96 | 3.90 Min. | 3.92~3.95 | 3.90 Min. | 3.92~3.95 | |
Size | 20-10, 8-5, 5-3 3-1, 1-0, 1-0.5 |
0.5F, 0.3F 220F |
325F |
Products | Size(mm) | Specification | Typical Range |
---|---|---|---|
20~10mm | +10 | 90 Min | 91~97 |
8~5mm | +8.0 | 10 Max | 0~5 |
+4.75 | 90 Max | 91~95 | |
5~3mm | +4.75 | 10 Max | 2~8 |
+4.00 | 10~35 | 15~33 | |
-2.80 | 10 Max | 3~8 | |
3~1mm | +2.80 | 10 Max | 2~8 |
+2.00 | 20~50 | 25~45 | |
-1.80 | 10 Max | 2~8 | |
1~0mm | +1.00 | 5 Max | 0~4 |
+0.50 | 25~60 | 30~55 | |
+0.21 | 60~90 | 65~87 | |
-0.075 | 10 Max | 2~8 | |
1~0.5mm | +1.00 | 5 Max | 1~4 |
+0.71 | 30 Min | 38~60 | |
+0.50 | 90 Min | 92~96 |
Products | Size(mm) | Specification | Typical Range |
---|---|---|---|
0.5F | +0.50 | 5 Max | 0~4 |
+0.25 | 30~50 | 33~47 | |
+0.075 | 80Min | 85~95 | |
+0.3F | +0.30 | 5 Max | 0~4 |
+0.212 | 10~40 | 13~38 | |
+0.075 | 85 Min | 88~95 | |
220F | +0.30 | 3 Max | 0~2 |
+0.075 | 20~35 | 22~33 | |
-0.0750 | 65~80 | 67~78 | |
325F | +0.045 | 5 Max | 0~4 |